I was wondering the same thing.
We've been having the same thing to the north, except it's been sticking around longer (all day Friday, High temp 33°, finally had some sun by Saturday evening, High temp 42° and now another Dense Fog Advisory Sunday morning), so much for the "sunny, high in the 50's" forecast for the weekend!
Car was covered in ice Saturday morning and the VP2 registered 0.01" Saturday.
I was nearly hit by someone driving half way through a RED LIGHT and couldn't believe how many people did not have their headlights ON.
...and the fog sure affects people's perception of their speed (i.e. driving well over the speed limit is dense fog).
Well, at least I didn't encounter this
https://www.facebook.com/BrandonOrrWeather/videos/188674434810402/https://www.facebook.com/BrandonOrrWeather/posts/188694794808366 (yes, that is a flipper vehicle near the exit ramp)